参数资料
型号: EVAL-AD7747EBZ
厂商: Analog Devices Inc
文件页数: 9/28页
文件大小: 0K
描述: BOARD EVAL FOR AD7747
标准包装: 1
传感器类型: 触摸,电容式
接口: I²C
电源电压: 2.7 V ~ 5.25 V
嵌入式:
已供物品: 板,缆线,CD
已用 IC / 零件: AD7747
产品目录页面: 781 (CN2011-ZH PDF)
相关产品: AD7747ARUZ-REEL7-ND - IC CONV CAP TO DIG 24BIT 16TSSOP
AD7747ARUZ-REEL-ND - IC CONV CAP TO DIG 24BIT 16TSSOP
AD7747ARUZ-ND - IC CONV 24BIT CAP-DGTL 16-TSSOP
AD7747
Rev. 0 | Page 17 of 28
EXC SETUP REGISTER
Address Pointer 0x09, Default Value 0x03
Capacitive channel excitation setup.
Table 15. EXC Setup Bit Map
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Mnemonic
EXCDAC
EXCEN
EXCLVL1
EXCLVL0
Default
0
1
Table 16.
Bit
Mnemonic
Description
7 to 4
These bits must be 0 for proper operation.
3
EXCDAC
CAPDAC excitation. This bit must be set to 1 for the proper capacitive channel operation.
2
EXCEN
CIN and AC SHLD excitation. This bit must be set to 1 for the proper capacitive channel operation.
Excitation Voltage Level. Must be set to ±VDD × 3/8 to allow operation for specified performance.
EXCLVL1
EXCLVL0
Voltage on Cap
EXC Low Level
EXC High Level
0
±VDD/8
VDD × 3/8
VDD × 5/8
0
1
±VDD/4
VDD × 1/4
VDD × 3/4
1
0
±VDD × 3/8
VDD × 1/8
VDD × 7/8
1
0
EXCLVL1,
EXCLVL0
1
±VDD/2
0
VDD
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